Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2024

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted EPS Attributable to Alcoa Corporation Common Shareholders

The share information used to compute basic and diluted EPS attributable to Alcoa Corporation common shareholders was as follows (shares in millions):

	2024		2023		2022
Average shares outstanding—basic		212		178		181
Effect of dilutive securities:
Stock options		—		—		—
Stock units		2		—		—
Average shares outstanding—diluted		214		178		181